char _potential_articulation[256] = {
  0,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,
  0,1,1,1,1,1,1,1,0,1,0,0,0,1,0,0,
  0,1,1,1,1,1,1,1,0,1,0,0,0,1,0,0,
  0,1,1,1,1,1,1,1,0,1,0,0,0,1,0,0,
  0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
  1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
  0,1,1,1,1,1,1,1,0,1,0,0,0,1,0,0,
  0,1,1,1,1,1,1,1,0,1,0,0,0,1,0,0,
  0,0,0,0,1,1,0,0,1,1,0,0,1,1,0,0,
  1,1,1,1,1,1,1,1,1,1,0,0,1,1,0,0,
  0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
  0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
  0,0,0,0,1,1,0,0,1,1,0,0,1,1,0,0,
  1,1,1,1,1,1,1,1,1,1,0,0,1,1,0,0,
  0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
  0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0};

